/Engine/Source/Runtime/Engine/Classes/PhysicsEngine/ConstraintDrives.h
Linear Drive
struct FLinearDriveConstraint
uint8:  1
bEnablePositionDrive
FVector
PositionTarget
Target position the linear drive.
FVector
VelocityTarget
Target velocity the linear drive.
FConstraintDriv...
XDrive
FConstraintDriv...
YDrive
FConstraintDriv...
ZDrive